💳 银行卡号校验（Luhn）Bank Card Number Validator (Luhn)

使用说明与常见问题How-to & FAQ

「银行卡号校验（Luhn）」是什么？What is the Bank Card Number Validator (Luhn)?

用 Luhn 算法批量校验银行卡/信用卡号是否有效，并识别卡组织（银联、Visa、Mastercard、AmEx、JCB）。本地运行。Check card numbers with the Luhn algorithm and detect the network (UnionPay, Visa, Mastercard, AmEx, JCB…).

如何使用「银行卡号校验（Luhn）」？How do I use the Bank Card Number Validator (Luhn)?

在「银行卡号校验（Luhn）」中，把内容粘贴或输入到上方输入框，结果会实时显示在下方，点击「复制结果」即可复制。In the Bank Card Number Validator (Luhn): Paste or type into the input box; the result appears below instantly — click "Copy result" to copy it.

校验通过就代表卡是真的吗？Does passing mean the card is real?

不是。Luhn 只能发现输错的数字，不能确认卡片存在或可用。本工具不会上传卡号。No. Luhn only catches typos; it can't confirm the card exists. Numbers are never uploaded.

支持繁体中文和生僻字吗？Does it support Traditional and rare characters?

「银行卡号校验（Luhn）」基于内置字库/词库离线运行，常用字和大部分生僻字都能处理，所有内容只在本地处理。The Bank Card Number Validator (Luhn) runs offline using built-in dictionaries and handles common and most rare characters locally.

「银行卡号校验（Luhn）」免费吗？需要注册吗？Is the Bank Card Number Validator (Luhn) free? Do I need an account?

「银行卡号校验（Luhn）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Bank Card Number Validator (Luhn) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.